Bobeet walkeb



(No Model.)

. R. WALKER. STEP AND EXTENSION-LADDER; Np. 302,066. Patented July 15, 1884.

5 I like those of an ordinary step-ladder. .U-pon UNITED STATES PATENT OFFICE.

ROBERT WALKER, on OAKLAND, CALIFORNIA.

STEP AND EXTENSION LADDER.

SPECIFICATION forming part of Letters Patent No. 302,066, dated July 15, I884.

Applicationfiled April 24, 1884. (No model.)

. be used as an extension or as a step ladder at will.

It consists of two ladder-sections united by a rod and slotted connections, so that the two parts being united at one end may be separated atthe other, in a manner. of an ordinary step-ladder; or by extending the two in line they may be'locked together, so as to form a rigid continuous ladder of nearly double the length of either section.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is aview of my device arranged as a step-ladder. Fig. 2 shows it extended. Fig. 3 is a detail of construction.

A and B are the two sections of my ladder. The part A may preferably have broad steps,

tions stand as shown in this figure, the rod D v is held at the lower part of the slot C and prevents it from moving by two latches, E,

1 are thrown back, so as to allow the rod D to slip to the upper part of theslot O. The ladders are then turned about this rod until they are in a straight line. The adjacent ends of each of th e ladder-sections have semicircular notches or grooves G formed in them. The notches in the upper end of the part A fit upon the lower round of the part B when the two sections are moved toward each other. The sides sired, independent projecting lugs may be fixed to either section to receive the notches in the ends. When the two sections have been pressed together, the rod D will slip down to the bottom of the slot 0, and the latches E may again be pressed down, so as to hold the rod securely against the lower edge of the slot. The two sections are thus rigidly locked in line with each other, and form a ladder nearly double the length of either section and more rigid than if made in a single piece.

In order to strengthen the ends of the sections where the notches or, grooves are made, short bolts pass through them from one edge to the other, and may be secured by nuts or by riveting long washers at each side, so that the strain upon these notches will not split the ends of the sections orbreak them 6ft.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. The section A, having slots 0 upon the rear side, and the latches E pivoted to it, in

combination with the section B, the sides of which extend outside of A, and the rod D, se-

cured to them and passing through the slots, 

